I can agree with part of what you're saying but it is important to remember that lots of frontline services had dogshit shifts imposed on them by this pandemic; for instance I know of 2 people that are A&E nurses and they spent a week doing 15-18 hours a day and sleeping at their hospital to meet demand. Demand they'd never seen before and there was no realistic formal policy or procedure in place to respond to it.
I personally had days off cancelled and started at 5am every day for 7 days in a row, finishing at 7pm and seriously doubting life choices for 3 weeks. I was then deployed onto what was effectively a body recovery team for Covid victims dying outside of a hospital setting for 3 months.
Having done that and being aware of the demands placed on some of these frontline workers I do understand where the humorous videos and generally just pratting about come from, it's black humour. Comes across as unprofessional but it is a recognised way of dealing with trauma and stress.